Investigating the factors affecting the resistance of a wire
Factors 1) Length of wire can affect the resistance of a wire because there are more atoms in a longer wire for the electrons to pass through. 2) Thickness of wire can affect the resistance of a wire because there is more room for electrons to pass through so the thicker the wire the less resistance. 3) Material of wire can affect the resistance of a wire because some materials resist the flow of electrons more than others. 4) Temperature can affect the resistance of a wire because the atoms vibrate and get in the way of passing electrons causing them to change course and so the resistance increases. I have chosen length of wire because it is the simplest and easiest factor to measure and will provide the most accurate results. Resistance Components resist the flow of current through them. They have resistance. The bigger the resistance of a component or components the smaller the current that flows for a particular voltage. ... R= Resistance. The resistance is the opposition to the flow of electrons. ... The greater the resistance the smaller the current. ... Apparatus List Power pack Meter Ruler Nichrome wire (22swg) 1m in length Wires Crocodile clips Ammeter Voltmeter Variable resistor Diagram Method 1) Collect apparatus and set up as in diagram.